Cover for fluid systems and related methods

ABSTRACT

Embodiments of a high-pressure, high power, reciprocating positive displacement fluid pumping system and methods are included. The system may include a high-pressure, high power, reciprocating positive displacement pump including a pump plunger, a fluid end block assembly, and a fluid cover. The fluid end block assembly may include a fluid end block body, a suction port, a discharge port, a pump bore positioned in and extending through the fluid end block body, and a fluid chamber positioned in the fluid end block body and in fluid communication with each of the suction port, the discharge port, and the pump bore. The fluid chamber has an open end portion, and the pump plunger may be positioned to move in the pump bore to pressurize one or more fluids in the fluid chamber. The fluid cover includes a monolithic body having a first portion and a second portion, the first portion being received in the open end portion and sealably engaged with the fluid end block body, the second portion being mechanically connected to the fluid end block body.

PRIORITY CLAIM

This is a continuation of U.S. Non-Provisional application Ser. No.15/929,652, filed May 14, 2020, titled “COVER FOR FLUID SYSTEMS ANDRELATED METHODS,” which claims priority to and the benefit of, U.S.Provisional Application No. 62/704,462, filed May 12, 2020, titled“COVER FOR FLUID SYSTEMS AND RELATED METHODS,” and U.S. ProvisionalApplication No. 62/704,476, filed May 12, 2020, titled “COVER FOR FLUIDSYSTEMS AND RELATED METHODS,” the disclosures of which are incorporatedherein by reference in their entireties.

BACKGROUND

The present disclosure generally relates to pressurized fluid systems,fluid end covers, and methods, for example, high pressure single actingreciprocating pumping systems and methods such as those that includehydraulic fracturing single acting reciprocating pumps. Specifically,the present disclosure relates to a fluid cover for a fluid end blockassembly of hydraulic fracturing pumping systems.

Hydraulic fracturing often is used to produce oil and gas in an economicmanner from low permeability reservoir rocks, such as shale. Hydraulicfracturing restores or enhances productivity of a well by creating aconductive flow path of hydrocarbons between the reservoir rock and awellbore. During hydraulic fracturing, a fluid initially is pumped underhigh pressure to fracture rock in a reservoir formation and open a flowchannel. Thereafter, a proppant-carrying fluid, e.g., a fluid thatcomprises proppant in the form of granular solid and/or semi-solidcomponents, e.g., sand, ceramics, is pumped to continue opening andwidening the flow channel while suspending proppant inside it. Theproppant thus keeps the flow path opened for the hydrocarbons to flow.

Hydraulic fracturing treatments may be performed using single actingreciprocating fracturing pumps to deliver fluids at a high pressure,specifically, above the fracture pressure of the rock in a reservoirformation. These fracturing pumps are of a type referred to asreciprocating plunger pumps. Such pumps may have multiple pumps, forexample, 3 or 5 plungers to form “triplex” and “quintuplex” pumps,respectively. In such pumps, one or more plungers moves linearly backand forth in a cylindrical bore, traveling in and out of a pump fluidchamber. The fluid chamber is in communication with a suction or intakeport and discharge port. Each port may include additional fluid handlingcomponents, for example, springs and valves (such as a one-way valve).

In this regard, fluid enters the chamber through the suction port as theplunger withdraws from the chamber. It is then pumped out of the chamberthrough the discharge port as the plunger enters the chamber.

The plungers are part of what is generally referred to as the fluid endof the pumping system, a major component of which is a pump housing orfluid end block assembly. Accordingly, the fluid end block assembly mayinclude passages or bores, e.g., cylindrical bores, in which theplungers travel, and within which valves, suction and discharge ports,fluid covers and other closures, etc., may be positioned.

The cyclic movement of the plungers may forcibly pressurize fluidsinside the fluid end block assembly of the pumping system. The ruggedenvironments, high pressure of the fluid, and high power operations ofthe pumps causes fluid ends to become damaged, broken, and unusable, maydecrease the usable life of the fluid ends, and may cause operationaldowntime or increased costs associated with pumping system operations ata well site.

SUMMARY

In view of the foregoing, there is an ongoing need for enhanced pumpingsystem components and methods more suitable for use in the fluid endblock assembly of a pumping system when being used in the associatedrugged environments, as well as for high pressure and high poweroperations.

According to one embodiment of the disclosure, a high-pressure, highpower, reciprocating positive displacement fluid pumping system mayinclude a high-pressure, high power, reciprocating positive displacementpump having a pump plunger, a fluid end block assembly, and a fluidcover. The fluid end block assembly, for example, may include a fluidend block body, a suction port, a discharge port, a pump bore positionedin and extending through the fluid end block body, and a fluid chamberpositioned in the fluid end block body and in fluid communication witheach of the suction port, the discharge port, and the pump bore. Thefluid chamber has an open end portion, and the pump plunger ispositioned to move in the pump bore to pressurize one or more fluids inthe fluid chamber. An embodiment of the fluid cover, for example, mayhave a monolithic body including a first portion and a second portion.The first portion may be received in the open end portion and sealablybe engaged with the fluid end block body. The second portion may beconnected mechanically to the fluid end block body. The fluid cover mayinclude a shoulder that is positioned between the first portion and thesecond portion. The shoulder may be engaged with the fluid block endbody to seal the open end portion. In some embodiments, the shoulder mayinteract with the open end portion to align the fluid cover with theopen end portion.

According to another embodiment of the disclosure, a fluid end blockassembly for a high-pressure, high power, reciprocating positivedisplacement fluid pumping system may include a fluid end block body, apump bore positioned in and extending through the fluid end block body,a plurality of ports including a suction port and a discharge port whichcollectively provide access to and from the pump bore, and a fluidchamber positioned in the fluid end block body. The fluid chamber may bepositioned in fluid communication with each of the suction port, thedischarge port, and the pump bore. The fluid chamber, for example, hasan open end portion, and the pump bore may be positioned to receive amovable pump plunger to pressurize one or more fluids when located inthe fluid chamber. A fluid cover may be connected to the fluid end blockbody, and the fluid cover may include a monolithic body having a firstportion and a second portion. The first portion may be received in theopen end portion and may be configured to align the fluid cover with theopen end portion. The second portion may be connected mechanically tothe fluid end block body.

According to yet another embodiment of the disclosure, a fluid cover forbeing sealably engaged with a fluid end block assembly of ahigh-pressure, high power, reciprocating positive displacement fluidpumping system may include a monolithic body with a first portion and asecond portion. The first portion, for example, may be received in anopen end portion of a fluid chamber of the fluid end block assembly andsealably may be engaged with the fluid end block assembly. The firstportion may be configured to engage the open end portion of the fluidchamber to align the fluid cover with the open end portion. The secondportion may be connected mechanically to the fluid end block assembly.

An embodiment of the disclosure also provides a method of operating ahigh-pressure, high power, reciprocating positive displacement fluidpumping system that includes obtaining a fluid end block assembly thathas a fluid end block body, suction port, a discharge port, a pump borepositioned in and extending through the fluid end block body, and afluid chamber positioned in the fluid end block body and in fluidcommunication with each of the suction port, the discharge port, and thepump bore. The fluid chamber may have an open end portion. The methodfurther may include obtaining a high-pressure, high power, reciprocatingpositive displacement pump that has a pump plunger and fluidlyconnecting the pump to the fluid end block assembly. The method mayinclude aligning a fluid cover with the fluid end block by inserting afirst portion of the fluid cover into the open end portion. The firstportion may engage the open end portion to align the fluid cover withthe fluid end block. The fluid cover may include a monolithic bodyincluding the first portion and a second portion. The method furtherincludes sealably connecting the fluid cover to the fluid end block bymechanically connecting the second portion to the fluid end block body.The method further may include operating the pump. The operating of thepump includes moving the pump plunger in the pump bore to pressurize oneor more fluids in the fluid chamber.

An embodiment of the disclosure also provides a method of assembly afluid pumping system that includes inserting a first portion of a fluidcover into an open end portion of a fluid end block assembly andmechanically connecting a second portion of the fluid cover to the openend portion. The first portion may engage the fluid end block assemblyto align the fluid cover with the open end portion. The fluid cover maycomprise a monolithic body having the first and second portion.Mechanically connecting the second portion of the fluid cover mayinclude the first portion sealing the open end portion of the fluid endblock.

Those skilled in the art will appreciate the benefits of variousadditional embodiments reading the following detailed description of theembodiments with reference to the below-listed drawing figures. It iswithin the scope of the present disclosure that the above-discussedaspects be provided both individually and in various combinations.

BRIEF DESCRIPTION OF THE DRAWINGS

According to common practice, the various features of the drawingsdiscussed below are not necessarily drawn to scale. Dimensions ofvarious features and elements in the drawings may be expanded or reducedto more clearly illustrate the embodiments of the disclosure.

FIG. 1A is a schematic diagram of showing a layout of a fluid pumpingsystem according to an embodiment of the disclosure.

FIG. 1B is an enlarged, sectional view of a fluid end block assembly ofthe fluid pumping system of FIG. 1A according to an embodiment of thedisclosure.

FIG. 2A is a perspective view of a fluid cover component of aconventional fluid cover assembly according to an embodiment of thedisclosure.

FIG. 2B is a side view of the fluid cover component of FIG. 2A accordingto an embodiment of the disclosure.

FIG. 3A is a perspective view of a retainer component of a conventionalfluid cover assembly according to an embodiment of the disclosure.

FIG. 3B is a side view of the retainer component of FIG. 3A according toan embodiment of the disclosure.

FIG. 4 is an enlarged, sectional view of an operation of the fluid endblock assembly of FIG. 1B according to an embodiment of the disclosure.

FIG. 5 is another enlarged, sectional view of the fluid end blockassembly of FIG. 1B according to an embodiment of the disclosure.

FIG. 6A is a perspective view of an integrated fluid cover according toa first exemplary embodiment of the disclosure.

FIG. 6B is a side view of the integrated fluid cover of FIG. 6Aaccording to an embodiment of the disclosure.

FIG. 6C is a top view of the integrated fluid cover of FIG. 6A accordingto an embodiment of the disclosure.

FIG. 7A is a side view of an integrated fluid cover according to asecond exemplary embodiment of the disclosure.

FIG. 7B is another side view of the integrated fluid cover of FIG. 7A,with a seal member shown in cross-section according to an embodiment ofthe disclosure.

FIG. 8 is a sectional view of the integrated fluid cover of FIG. 7Asealably coupled with a fluid end block assembly of a fluid pumpingsystem according to an embodiment of the disclosure.

FIG. 9 is a side view of an integrated fluid cover according to a thirdexemplary embodiment of the disclosure.

FIG. 10 is a sectional view of the integrated fluid cover of FIG. 9sealably coupled with a fluid end block assembly of a fluid pumpingsystem according to an embodiment of the disclosure.

Corresponding parts are designated by corresponding reference numbersthroughout the drawings.

DETAILED DESCRIPTION

The embodiments of the present disclosure are directed to pressurizedfluid systems, for example, high pressure single acting reciprocatingpumping systems such as those that include hydraulic fracturing singleacting reciprocating pumps. In particular, the embodiments of thepresent disclosure are directed to fluid covers for use with suchpressurized fluid systems.

FIG. 1A illustrates a schematic view of a high-pressure, high power,reciprocating positive displacement fluid pumping system 100 accordingto an embodiment of the disclosure. The diagram of the system 100 showsa typical pad layout for a fracturing pump system, and the system 100includes a plurality of fracturing or frac pumps or pumping units FP1,FP2, FP3, FP4, FP5, FP6, FP7, FP8 with the pumping units all operativelyconnected to a manifold M that is operatively connected to a wellhead W.By way of an example, in order to achieve a maximum rated horsepower of24,000 HP for the pumping system 100, a quantity of eight (8) 3000horsepower (HP) pumping units may be used. It will be understood thatthe fluid pumping system 100 may include associated service equipmentsuch as hoses, connections, and assemblies, among other devices andtools. Each of the pumping units FP1, FP2, FP3, FP4, FP5, FP6, FP7, FP8may include a fluid end block assembly 101.

FIG. 1B illustrates a portion of a fluid end block assembly 101 of theembodiment of the fluid pumping system 100 as shown in a sectional view.In one embodiment, the fluid end block assembly 101 may be in fluidcommunication with and/or may form a portion of the manifold M. In thisregard, one or more of the frac pumps or pumping units FP1, FP2, FP3,FP4, FP5, FP6, FP7, FP8 may be fluidly coupled to the fluid end blockassembly 101.

The fluid end block assembly 101, as shown, includes a fluid end blockbody 121 having intersecting horizontal and vertical bore passages thatare each in fluid communication with a fluid end chamber 105 in thefluid end block body 121. The vertical bore passage includes an intakeport or suction port 102. The fluid may enter the fluid end block body121 from an intake source, for example, a fluid supply manifold. Thevertical bore passage also includes an outlet port or discharge port 103through which fluid may exit the fluid end block body 121 or flow toanother portion of the fluid end block assembly 101. One or both of thesuction port 102 and the discharge port 103 thus collectively provideaccess to and from the fluid end chamber 105 and may include fluidhandling elements or components such as seats, valves, springs, and soforth, as will be understood by those skilled in the art.

The discharge port 103, as shown, includes a discharge bore 104, e.g.,an opening or fluid channel, through which pressurized fluid may exitthe fluid end block assembly 101 to downstream components of the fluidpumping system coupled to the fluid end block assembly 101. A dischargecover assembly or discharge cap assembly 116 may be coupled to a portionof the discharge port 103, as described further herein.

As shown, a piston/plunger 107 (broadly, “pump member”) is positioned ina pump bore 108 along the horizontal bore of the fluid end blockassembly 101. The plunger 107 is movable in the pump bore 108, forexample, via reciprocating actuation of one or more of the pumping unitsFP1, FP2, FP3, FP4, FP5, FP6, FP7, FP8, with a forward stroke in thedirection of the fluid chamber 105 and that terminates proximate thefluid chamber 105, and a rearward stroke in a direction away from thefluid chamber 105 and opposite the direction of the forward stroke. Oneor more of the pumping units FP1, FP2, FP3, FP4, FP5, FP6, FP7, FP8 mayactuate the plunger 107 to move/reciprocate in the pump bore 108, forexample, via a controller or control system, as will be understood bythose skilled in the art, that may be in electronic communication withone or more of the pumping units, and which may be operated under manualand/or processor control.

As shown, the forward stroke of the plunger 107 terminates opposite anopen end portion 106 of the fluid chamber 105. In one embodiment, theopen end portion 106 of the fluid chamber 105 is positioned in a portionof the fluid end block body 121 that includes an oblique or chamferedsurface 123 that extends toward an interior threaded portion 127 of thefluid end block body 121 along interior peripheries of the open endportion 106 of the fluid chamber 105 (see FIG. 5 ).

A fluid cover assembly 109 (broadly, “suction cap assembly” or “suctioncover assembly” or “intake cap assembly” or “intake cover assembly”) maybe sealingly engaged with and coupled to the fluid end block body 121,as described further herein.

An embodiment of the fluid cover assembly 109 may include a fluid covercomponent 110 having a generally cylindrical body with a flanged head111 including a tool engagement feature 113 for being engaged by a toolto place, position, help secure to, and/or remove the fluid covercomponent 110 from the end portion 106 of the fluid chamber 105 (seeFIGS. 2A-2B and 3A-3B). In this regard, the fluid cover component 110may be at least partially received within the end portion 106 of thefluid chamber 105 opposite the reciprocating path of the plunger 107. Asealing member 114, e.g., a rubber or other polymeric annular seal, maybe positioned on the cylindrical body of the fluid cover component 110.

The fluid cover component 110 may be at least partially received in theend portion 106 of the fluid chamber 105, and the fluid cover assembly109 may be mechanically connected to the fluid end block assembly 101via the mechanical connection of a retainer component 112 to the fluidend block body 121.

The retainer component 112, as shown in FIGS. 3A and 3B, may be aretainer nut or other fastener having a generally cylindrical body withan outer surface that defines a threaded portion 126 that is configuredto threadably engage the corresponding interior threaded portion 127 ofthe fluid end block body 121. In this regard, the retainer component 112may be threadably advanced into the end portion 106 of the fluid chamber105 to abut the flanged head portion 111 of the fluid cover component110, for example, such that an end of the retainer component 112contacts the head portion of the fluid cover component 112 at aninterface, e.g., a discontinuity between the material of the fluid covercomponent 110 and the material of the retainer component 112. As shown,the retainer component 112 may also define a tool engagement feature 117for being engaged by a tool to place, position, and/or remove theretainer component 112 from the end portion 106 of the fluid chamber105.

It will be understood that the discharge cap/cover assembly 116 of thedischarge port 103 may have a configuration that is generally similar tothe configuration of the fluid cover assembly 109 positioned at the openend portion 106 of the fluid chamber 105 near the suction port 102. Thedischarge cap/cover assembly 116 of the discharge port 103 may have adifferent configuration without departing from the disclosure.

Referring to FIG. 4 , fluid may be delivered via the suction port 102,for example, from a pump suction manifold and valve assembly, into thefluid chamber 105. The fluid in the fluid chamber 105 may be compressedby the plunger 107 upon a compression or delivery stroke, e.g., towardthe fluid chamber 105.

In the embodiment illustrated in FIG. 4 , the full extension length ofthe plunger 107 may extend at least partially toward the fluid chamber105 to compress fluids disposed therein. In this regard, as the plunger107 commences its delivery or compression stroke, the fluid positionedinside of the fluid end chamber 105 is compressed by the plunger 107 andsuch compression forces are translated into the surrounding walls of thefluid chamber 105. As the end portion 106 of the fluid chamber 105 isclosed by the fluid cover assembly 109 sealingly engaged with the fluidend block body 121, the pressurized fluid in the fluid end chamber 105flows into the discharge port 103, and out the discharge bore 104.

Following/preceding the above-described compression or delivery strokeof the plunger 107, in an intake or suction stroke, the plunger 107translates along the pump bore 108 of the fluid end block assembly 101away from the fluid chamber 105 to create a suction, e.g., negativepressure or vacuum, in the fluid chamber 105 that draws additional fluidinto the fluid chamber 105 in preparation for a subsequent compressionor delivery stroke.

Referring to FIGS. 6A-6C, an integrated fluid cover according to a firstexemplary embodiment of the disclosure is generally designated 221, andmay be used in a fluid pumping system that may be otherwise similar tothe fluid pumping system 100 described above.

In the illustrated embodiment, the integrated fluid cover 221 includes amonolithic body 223, e.g., a body monolithically formed of a singlecontinuous piece or block of material that has a unitary configurationso as to be free from any seams or discontinuities that extend from anouter surface of the body 223 to an interior portion of the body 223. Itwill be understood that the body 223 of the integrated fluid cover 221may include metallic, polymeric, and/or composite materials.

The body 223 of the integrated fluid cover 221 defines a fluid coverportion 225 (broadly, “first portion”) and a retainer portion 227(broadly, “second portion”). Each of the fluid cover portion 225 and theretainer portion 227 has a generally cylindrical configuration, with thefluid cover portion 225 having a first diameter D1 that is smaller thana second diameter D2 of the fluid cover portion 225.

The fluid cover portion 225 has a generally cylindrical configurationwith a free end or distal end 226 facing the fluid chamber 105. Thefluid cover portion 225 extends from the distal end 226 to a flangeportion 228 of the retainer portion 227. In this regard, the fluid coverportion 225 of the integrated fluid cover 221 may be at least partiallyreceived within the end portion 106 of the fluid chamber 105 of thefluid end block assembly 101.

As shown, the flange portion 228 of the retainer portion 227 extendsradially outwardly from the fluid cover portion 225. The retainerportion 227 also includes a threaded portion 229 extending away from theflange portion 228 and that is configured to engage the interiorthreaded portion 127 of the fluid end block body 121 to mechanicallyconnect to the fluid end block body 121 as described above. In oneembodiment, the flange portion 228 of the retainer portion 227 mayextend radially outwardly from the threaded portion 229 so as to form aprotrusion or protuberance along the outer surface of the retainerportion 227.

As shown, the seal member 114 (broadly, “first seal member”) may bepositioned on the fluid cover portion 225 of the integrated fluid cover221 between the distal end 226 and the flange portion 228 of theretainer portion 227. In this regard, when the fluid cover portion 225of the integrated fluid cover 221 is at least partially received in theend portion 106 of the fluid chamber 105, the seal member 114 may bepositioned to sealingly engage interior surfaces of the fluid end blockbody 121. The seal member 114 may align or center the fluid coverportion 225 within the end portion 106 of the fluid chamber 105.

As also shown, the body 223 of the integrated fluid cover 221 defines atool engagement feature 231 at a free end or proximal end surface 232 ofthe retainer portion 227. The tool engagement feature 231 may be, forexample and without limitation, a polygonal (e.g., hexagonal) recesshaving a configuration complementary to that of an insertion or removalor securing tool, such as an Allen wrench or other driver whenpositioned to secure the integrated fluid cover 221. Optionally, thetool engagement feature may have a different configuration, for exampleand without limitation, a protrusion, without departing from thedisclosure.

In this regard, rotation of the integrated fluid cover 221 viaengagement of a tool with the tool engagement feature 231 may causerotation of both the fluid cover portion 225 and the retainer portion227 of the integrated fluid cover 221 due to the monolithic constructionof the body 223 of the integrated fluid cover 221. Such a configurationmay obviate and reduce the number of tools required for insertion,removal, and other maintenance of a fluid cover in which, for example, aretainer portion and a fluid cover portion are separate components.

Furthermore, the aforementioned monolithic construction of the body 223of the integrated fluid cover 221 may provide a higher mass single bodyas compared to the bodies of a fluid cover portion and a retainerportion provided as separate components of a fluid cover assembly. Inthis regard, the integrated fluid cover 221 provides enhanced materialintegrity, durability, and fatigue resistance in high pressure fluidenvironments.

For example, in a conventional fluid cover assembly that includes aseparately coupled fluid cover portion and retainer portion, cyclic highfluid pressures produced in a fluid pump system may result in a waterhammer effect in which impacts the fluid cover portion and which istranslated towards the retainer portion. These fluid pulsations may beinfluenced by factors such as pump operating pressure, pump crankshaftrotation speed, suction and discharge valve efficiency, and effectivefluid end chamber fill volume per plunger stroke. The fluidpulses/forces thus produce a constant vibration and wear on componentsof the fluid block assembly 101, and may cause relative movement of thefluid cover portion and the retainer portion, which may result, forexample, in wearing down or away of threaded portions or other couplingfeatures that may create a clearance gap (see FIG. 5 ) between the fluidcover portion and the separate retainer portion, backing out ordisengagement of the retainer portion from an end portion of a fluid endblock, the loss of seal integrity between the fluid cover portion andthe end portion of the fluid end block that may lead to leakage offluids from the fluid end block, etc.

Accordingly, the disclosed integrated fluid cover 221 is resistant towear and failure produced in the cyclic high pressure fluid environmentsin a fluid end block assembly 101 so as to reduce damage (e.g., wash,wear, cracking, etc.), reduce maintenance cycles and downtimes, minimizeconsumable components for the fluid end block assembly 101, ensure themaintenance of proper sealing contact with surfaces of the fluid endblock assembly 101, and reduce leakage from the fluid end block assembly101.

In addition, because the tool engagement feature 231 may be engaged toboth position and seat the fluid cover portion 225 in the end portion106 of the fluid end block assembly 101 as well as engage/couple theretainer portion 227 with the fluid end block body 121, the number oftools employed for installation/maintenance of components of the fluidend block assembly 101 may be reduced, as well as obviating the need toalign a separate fluid cover portion and a retainer portion.

Further, constructing or manufacturing the fluid cover portion 225 andthe retainer portion 227 into a single monolithic body of the fluidcover 221 may increase resistance to backing out and/or rotation of thefluid cover 221 during the rugged environment associated with operationof a fluid end. For example, with a separate fluid cover portion andretainer portion (see FIGS. 2A-3B), the fluid cover portion is subjectto translation forces towards and away from the retainer portion as aresult of what is known as the water hammer effect as will be understoodby those skilled in the art, and the retainer portion is subject torotational forces as a result of the retainer portion engaging theflange thereof. In contrast, the monolithic body of the fluid cover 221increases a mass resisting the water hammer effect. In addition, as theretainer portion 227 and the fluid cover portion 225 are monolithicallyformed together, the water hammer effect may be reduced by eliminatingmovement between the retainer portion 227 and the fluid cover portion225. Additionally, the frictional engagement between the monolithicfluid cover 221 may be increased to further resist the water hammereffect. For example, the seal member 114 frictionally engages the innersurface of the fluid end block body 121 which may increase resistance torotation of the fluid cover portion 225 relative to the fluid end blockbody 121 when compared to a non-monolithically formed fluid cover. Thisengagement further may increase a service life of the fluid cover 221and/or the fluid end block body 121 by reducing the number of componentparts and by reducing the risk of failure of this particular componentpart due to its construction as illustrated and described in theassociated embodiments.

Referring to FIGS. 7A and 7B, an integrated fluid cover according to asecond exemplary embodiment of the disclosure is generally designated321, and may be sealably coupled to the fluid end block assembly 101 ofa fluid pumping system 300 that may be otherwise similar to the fluidpumping systems described above, e.g., system 100. The integrated fluidcover 321 may have one or more features that are substantially similarto those described above with regard to the integrated fluid cover 221,and like or similar features are designated with like or similarreference numerals.

The integrated fluid cover 321 has a body 323 that is substantiallysimilar to the body 223 of the integrated fluid cover 221, except thatthe body 321 defines a machined or molded annular recess or groove 322along the fluid cover portion 225 adjacent the flange portion 228 of theretainer portion 227 and for at least partially receiving a seal member324 (broadly, “second seal member”) therein. The seal member 324 may bea flexible and/or resilient member, such as a polymeric (e.g., rubber)ring, for example and without limitation, an O-ring.

In this regard, the annular groove 322 may provide for an arrangement ofthe seal member 324 about the fluid cover portion 225 of the integratedfluid cover 321 that has a low or minimized profile, e.g., such that aminimal portion of the seal member 324 extends above the annular groove322. Accordingly, the annular groove 322 and seal member 324 cooperateto provide an arrangement of the seal member 324 that enhances afluid-resistant seal against the fluid end block body 121, but does notinterfere with proper placement or receipt of the fluid cover portion225 in the end portion 106 of the fluid chamber 105.

Furthermore, and with additional reference to FIG. 8 , when the fluidcover portion 225 of the integrated fluid cover 321 is at leastpartially received with the end portion 106 of the fluid chamber 105,the seal member 324 may be compressed to a reduced profile, which mayalso have the effect of enhancing the sealing engagement of the sealmember 324 against the fluid end block body 121. As shown in FIG. 8 ,the flange portion 228 of the integrated fluid cover 321 is positionedto seat against an internal surface 128 of end portion 106 of the fluidchamber 105. Specifically, the seal member 324 may be configured toengage the chamfered surface 123 of the fluid end block body 121 suchthat the seal member 324 fills space or at least some of theinterstitial space between the retainer portion 225 and the fluid endblock body 121 as will be understood by those skilled in the art.

Referring now to FIG. 9 , an integrated fluid cover according to a thirdexemplary embodiment of the disclosure is generally designated 421,which may be sealably coupled to the fluid end block assembly 101 of afluid pumping system 400 that may be otherwise similar to the fluidpumping systems described above, e.g., systems 100, 300. The integratedfluid cover 421 may have one or more features that are substantiallysimilar to those described above with regard to the integrated fluidcovers 221, 321 and like or similar features are designated with like orsimilar reference numerals.

The integrated fluid cover 421 has a body 423 that is substantiallysimilar to the body 223 of the integrated fluid cover 221, except thatthe body 421 includes a neck portion or shoulder 422 extending from asurface of the fluid cover portion 225 to the flange portion 228 of theretainer portion 227. In this regard, the shoulder 422 of the integratedfluid cover 421 has a tapered configuration that provides an obliqueannular surface positioned between the fluid cover portion 225 and theretainer portion 227 to substantially surround the fluid cover 421. Theoblique annular surface of the shoulder 422 increases in diameter as theshoulder 422 extends towards the flange portion 228 of the retainerportion 227.

Accordingly, and with additional reference to FIG. 10 , when the fluidcover portion 225 of the integrated fluid cover 421 is at leastpartially received with the end portion 106 of the fluid chamber 105,the shoulder 422 may sealingly engage the chamfered surface 123 in africtional and/or wedged arrangement so as to provide an enhanced sealof the integrated fluid cover 421 against the fluid end block body 121that may resist fluid leakage from the fluid chamber 105. In oneembodiment, both the fluid end block body 101 and at least the shoulder422 of the integrated fluid cover 421 may be comprised of metal suchthat the interface of the shoulder 422 with the outer edge of the endportion 106 of the fluid chamber is a metal-to-metal interface thatprovides an enhanced seal. In some embodiments, the shoulder 422 mayinteract with the chamfered surface 123 to align or center theintegrated fluid cover 421 with the end portion 106 of the fluid chamber105.

This is a continuation of U.S. Non-Provisional application Ser. No.15/929,652, filed May 14, 2020, titled “COVER FOR FLUID SYSTEMS ANDRELATED METHODS,” which claims priority to and the benefit of, U.S.Provisional Application No. 62/704,462, filed May 12, 2020, titled“COVER FOR FLUID SYSTEMS AND RELATED METHODS,” and U.S. ProvisionalApplication No. 62/704,476, filed May 12, 2020, titled “COVER FOR FLUIDSYSTEMS AND RELATED METHODS,” the disclosures of which are incorporatedherein by reference in their entireties.

The foregoing description of the disclosure illustrates and describesvarious exemplary embodiments. Various additions, modifications,changes, etc., could be made to the exemplary embodiments withoutdeparting from the spirit and scope of the disclosure. It is intendedthat all matter contained in the above description or shown in theaccompanying drawings shall be interpreted as illustrative and not in alimiting sense. Additionally, the disclosure shows and describes onlyselected embodiments of the disclosure, but the disclosure is capable ofuse in various other combinations, modifications, and environments andis capable of changes or modifications within the scope of the inventiveconcept as expressed herein, commensurate with the above teachings,and/or within the skill or knowledge of the relevant art. Furthermore,certain features and characteristics of each embodiment may beselectively interchanged and applied to other illustrated andnon-illustrated embodiments of the disclosure.

What is claimed is:
 1. A high-pressure, high power, reciprocatingpositive displacement fluid pumping system, the system comprising: ahigh-pressure, high power, reciprocating positive displacement pumpcomprising a pump plunger; a fluid end block assembly including a fluidend block body, a suction port, a discharge port, a pump bore positionedin and extending through the fluid end block body, and a fluid chamberpositioned in the fluid end block body and in fluid communication witheach of the suction port, the discharge port, and the pump bore, thefluid chamber having an open end portion extending to an opening of thefluid end block body, the open end portion having an inner cylindricalwall and an interior chamfered surface positioned between the innercylindrical wall and the opening, and the pump plunger being movablypositioned in the pump bore to pressurize one or more fluids in thefluid chamber; a fluid cover including: a monolithic body having alongitudinal axis and including: a first end, a second end opposite thefirst end along the longitudinal axis, a first portion having an outercylindrical surface that extends axially from the first end, the outercylindrical surface having a first outer diameter and including anannular groove, and a second portion extending axially from the firstportion to the second end, the second portion having a second outerdiameter greater than the first outer diameter and including: a threadedportion mechanically connected to the fluid end block body, and a flangeportion positioned axially between the threaded portion and the annulargroove; at least one first seal member positioned on the outercylindrical surface of the first portion such that the outer cylindricalsurface is spaced away from the inner cylindrical wall of the open endportion by the at least one first seal member and such that the at leastone first seal member sealingly is engaged with the inner cylindricalwall; and a second seal member at least partially received in theannular groove such that the second seal member is compressed againstthe interior chamfered surface.
 2. The fluid pumping system of claim 1,wherein the at least one first seal member is positioned between theflange portion and the first end of the monolithic body.
 3. The fluidpumping system of claim 1, wherein the fluid open end portion has athreaded interior surface positioned between the opening and thechamfered interior surface, wherein the threaded portion engages thethreaded interior surface to secure the fluid cover to the fluid endblock assembly, and wherein the second end of the monolithic body has atool engagement feature to engage with a securing tool when positionedto secure the fluid cover.
 4. The fluid pumping system of claim 1,wherein the second seal member and the annular groove are configuredsuch that a portion of the second seal member extends radially outwardbeyond the first outer diameter of the first portion to provide afluid-resistant seal against the interior chamfered surface of the fluidend block body.
 5. A fluid cover for being sealably engaged with a fluidend block assembly of a high-pressure, high power, reciprocatingpositive displacement fluid pumping system, the fluid cover comprising:a monolithic body having a longitudinal axis and including: a first end,a second end opposite the first end along the longitudinal axis, a firstportion having an outer cylindrical surface extending axially from thefirst end, the outer cylindrical surface having a first outer diameter,the outer cylindrical surface configured to be received in an interiorportion of an open end portion of a fluid chamber of the fluid end blockassembly, the open end portion extending to an opening of the fluid endblock assembly and having an interior chamfered surface positionedbetween the interior portion and the opening, and the outer cylindricalsurface having an annular groove; a second portion extending axiallyfrom the first portion to the second end, the second portion having asecond diameter greater than the first diameter and including: athreaded portion for being mechanically connected to the fluid end blockassembly, and a flange portion between the threaded portion and theannular groove of the first portion; at least one first seal memberpositioned on the outer cylindrical surface of the first portion suchthat the at least one first seal member sealingly is engaged with theinterior portion; and a second seal member at least partially receivedin the annular groove such that the second seal member is configured toengage with the interior chamfered surface of the open end portion. 6.The fluid cover of claim 5, wherein the at least one first seal memberis positioned between the flange portion and the first end.
 7. The fluidcover of claim 5, wherein the second seal member and the annular grooveare configured such that a portion of the second seal member extendsradially outward beyond the first outer diameter of the first portion toprovide a fluid-resistant seal against an interior chamfered surface ofthe fluid end block assembly.
 8. The fluid cover of claim 5, wherein thethreaded portion is configured to engage with a threaded interiorsurface of the fluid end block assembly that is positioned between theinterior chamfered surface and the opening to secure the fluid cover inthe fluid end block assembly, and wherein the second end of themonolithic body includes a tool engagement feature configured to beengaged by a securing tool when positioned to secure the fluid cover. 9.A method of operating a high-pressure, high power, reciprocatingpositive displacement fluid pumping system, the method comprising:obtaining a fluid end block assembly including a fluid end block body, asuction port, a discharge port, a pump bore positioned in and extendingthrough the fluid end block body, and a fluid chamber positioned in thefluid end block body and in fluid communication with each of the suctionport, the discharge port, and the pump bore, the fluid chamber having anopen end portion that extends to an opening of the fluid end block body,the open end portion having an inner cylindrical wall and an interiorchamfered surface such that the interior chamfered surface is positionedbetween the inner cylindrical wall and the opening; obtaining ahigh-pressure, high power, reciprocating positive displacement pumpcomprising a pump plunger; fluidly connecting the pump to the fluid endblock assembly; inserting a fluid cover at least partially into the openend portion so as to align the fluid cover with the fluid end blockbody, the fluid cover including: a monolithic body having a longitudinalaxis and including: a first portion and a second portion, the firstportion having an outer cylindrical surface that extends from an end ofthe monolithic body toward the second portion, the outer cylindricalsurface having a first outer diameter and an annular groove, the secondportion having a second outer diameter greater than the first outerdiameter, the second portion including: an end surface of the fluidcover, the end surface including a tool engagement feature for engagingthe tool engagement feature with a tool to secure the fluid cover to thefluid end block body, a threaded portion, and a flange portion betweenthe threaded portion and the annular groove, and at least one first sealmember arranged on the outer cylindrical surface of the first portion, asecond seal member at least partially received in the annular groove;sealingly engaging the at least one first seal member with the innercylindrical wall such that the outer cylindrical surface is spaced awayfrom the inner cylindrical wall by the at least one first seal member;sealingly engaging the second seal member with the interior chamferedsurface; mechanically connecting the threaded portion to the fluid endblock body; and operating the pump, the operating the pump comprisingmoving the pump plunger in the pump bore to pressurize one or morefluids in the fluid chamber.
 10. The method of operating the fluidpumping system of claim 9, wherein inserting the fluid cover includesengaging the at least one first seal member with the inner cylindricalwall to align the fluid cover with the open end portion.
 11. The methodof operating the fluid pumping system of claim 9, further comprisingproviding a fluid-resistant seal against the interior chamfered surfaceof the fluid end block body with the second seal member.
 12. The methodof operating the fluid pumping system of claim 9, wherein the fluid endblock body has a threaded interior surface positioned between theinterior chamfered surface and the opening, and wherein the mechanicallyengaging comprising engaging the threaded portion of the fluid coverwith the threaded interior surface to secure the fluid cover in thefluid end block body.
 13. The method of claim 9, wherein the end of themonolithic body is positioned within the open end portion, and whereinsealingly engaging the at least one first seal member with the innercylindrical wall includes sealingly engaging the at least one first sealmember with the inner cylindrical wall such that the outer cylindricalsurface is spaced away from the inner cylindrical wall at the end of themonolithic body by the at least one first seal member.